Clamp the sheet metal in place on your work table to hold it in place while you work.
Best way to cut aluminum sheet metal.
There are two ways to cut round ducts.
Cutting aluminum sheet metal with a hammer and chisel is relatively straight forward line up the edge of the chisel along the line you wish to cut and strike the chisel with a hammer.
Tin snips are primarily used for cutting thin sheet metal like tin aluminum brass and thin gauge stainless steel.
An angle grinder fitted with an abrasive metal cutting disc works well to cut all kinds of metal including bolts angle iron rebar and even sheet metal.
Align the snips with the line you want to cut with the upper blade of the tin snips touching the sheet metal.
This weakens the aluminium and creates a fracture line.
They don t cut curves well.
But the discs wear down quickly cut slowly and shrink in diameter as you use them.
First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.
Sheet aluminium can be cut without the need for a guillotine or tin snips which tend to deform the metal.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
If your project requires curved cuts make an easy economical and adjustable.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
Instead we recommend using a diamond blade that s rated to cut ferrous metal.
To cut the sheets of metal rathe.